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T. STOKKE AND A. LARSENf OPENING MECHANISM FOR HERMETIC BOXES AND THE LIKE.

APPLICATION FILED JUNE ll, 19l9. 1,314,1 62. Patented Aug. 26,1919.

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UNITED "STATES PATENT OFFICE.

THORLEIF STOKKE AND ADOLF LARSEN, 0F HILLEVAAG, NEAR STAVAN GER, NORWAY,

ASSIGNORS OF ONE-THIRD T0 VAN GER, NORWAY.

JOHANNES MAELAND, 0F HILLEVAAG, NEAR STA- OPENING MECHANISM FOR HERMETIO BOXES AND THE LIKE.

Specification of Letters Patent.

Patented Aug. 26,1919.

I Application filed June 11, 1919. Serial No. 308,380.

To all whom it may concern:

Be it known that we, THORLEIF STOKKE and AnoLr LARSEN, both of Hillevaag, near Stavanger, in the Kingdom of Norway, have invented certain new and useful Improvements in Opening Mechanism for Hermetic Boxes and the like; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

The present invention relates to an opening mechanism for hermetic boxes or cans of the type in which there is provided in the cover an opening lip or tongue formed in the material of the cover by means of a weakened line and which may be made accessible by an opening key or the like by piercing the cover at the weakened line near the said tongue or lip and bending the same upward.

According to the present invention the weakened line which serves to form the said tongue or lip has the form of a closed curve one part of which extends along the edge of the cover, while another part of the curve is formed by an internally pro jecting hoop or bow so that there is formed on one side of the cover two adjacent oppositely directed tongues, one or both of which may be used for opening the box.

On the drawing is illustrated a form of the invention.

Figure 1 is a plan of the cover, and Fig. 2 is a similar plan with one tongue broken up.

The weakened line 1 comprises an inwardly projecting circular curve 2, by means of which there are formed two tongues or lips 4, 5, separated by a narrow strip 3. The tongues may be made accessible in the usual manner by piercing the cover at the weakened line near one end of the tongues and bending the same upward as indicated on Fig. 2. If the opening is not successful with the first tongue, the other one may be used. In order to provlde a support for the point of the key when piercing the weakened line bosses 7, 8, 9, 10 may be formed on each side of the same near the tongues 4, 5.

Claim:

In an arrangement for opening hermetic boxes and the like a weakened opening line in the cover of the box, said opening line having the form of a double closed curve, the exterior part of which runs along the edge of the cover while the interior part of the curve is formed by an inwardly projecting hoop or bow, said two parts of the curve forming at one or both of their connections an opening lip or tongue which may be utilized for opening the box by piercing the weakened line and bending up the tongue or lip in the usual manner.

In testimony that we claim the foregoing as our invention, we have signed our names in presence of two subscribing witnesses.

THORLEIF STOKKE. ADOLF LARSEN.

Witnesses OTTO ANDERSEN, Tnrovn Soso.

copies of this patent maybe obtained for live cents each, by addressing the "Commissioner of Patents, Washington, D. G. 

